Imagine if you could carry all of your personal documents, music and photos in something that is the size of your wallet! You don’t have to imagine, because Buy.com has a wide variety of Portable Hard Drives so you can have access to your files even when you are on the go. Portable Hard Drives can hold up to 500GB, but also come in 400GB, 320GB, 250GB and 160GB. And you get to choose from a large selection of brands which include Western Digital, Seagate and Iomega.